Discharge-valve for tank-cars, &amp;c.



I PATENTED MAR. 24, 1903.

0. 0. ROWLEY. DISCHARGE VALVE FOR TANK CARS, 8w.

APPLIOATION FILED SEPT. 2. 1902.

F0 MODEL.

U ITED STATES PATENT OFFICE. I

CHARLES O. ROWLEY, OF TOLEDO, OHIO.

DISCHARGE-VALVE FOR TANK-CARS, 84c.

SPECIFICATION formingpart of Letters Patent N 0. 723,409, dated March 24, 1903.

Application filed September 2,1902. Serial No. 121,729. (No model.)

It all whom it may concern:

Be it known that I, CHARLES O. ROWLEY, a citizen of the United States of America, residing at To1edo,in the county of Lucas and State of Ohio, have invented certain new and useful Improvements in Discharge-Valves for Tan k- Cars, &c., of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to new and useful improvements in discharge-valves for tankcars, &c., and has for its object to make a valve which can be but partially opened for the purpose of testing the valve or the contents of the car and at the same time securely hold the valve to its seat to form a tight joint and prevent the same from being displaced due to the jolting of the car, all by means of a cap threaded on the valve-stem and forming a tight closure for the end of the discharge-nob zle, so that even should the valve itself leak the contents would not escape to the ground, as certain railway companies will not accept tank-cars for shipment if the valve leaks five drops or more per minute.

To this end the invention consists of a closing-cap threaded on the stem of the valve to securely hold the same to its seat and at the same time form a tight joint with the discharge-nozzle itself, whereby a partial opening of the valve may be obtained without completely removing the cap, as is common with discharge-valves now in use in which an internally-threaded cap is used.

The invention consists, further, in the peculiar construction, arrangement, and combination of parts, all as more fully hereinafter described, and shown in the accompanying drawings, in which Figure l is a vertical central section through a valve embodying my invention; Fig. 2, a similar view partly in elevation and showing the cap partially unscrewed.

As shown in the drawings, A is the tank, to the outlet-opening of which the flanged nipple or valve-casing B is secured by means of suitable bolts or rivets, which casing is provided at its upper end with the taper valveseat a and at its lower end with the external threaded portion 1) for the attachment of the discharge-hose or common cap now in use.

0 is a winged valve fitting within the valvecasing and provided with a flaring shoulder c at its upper end cooperating with the valve seat ct to form a tight joint. dis a screwthreaded stem projecting from the under side of said winged portion, and e is a tubularprojection on the upper side of said valve, into which the rod f flts and is secured by a transverse pin 9 passing through an elongated aperture in said rod to allow for a slight play, said rod extending through the tank into the dome for operating the valvein the usual manner.

D is a cap fitting into and closing the end of the valve-casing, being provided With a squared end or wrench-hold h and an internally-screw-threaded nipple 2', adapted to be screwed onto the valve-stem d and securely draw the valve to'its seat, at the same time forming a tight joint itself by means of the packingj fitting into a recess in the cap and bearing against the end of the valve-casing, so that should the valve itself leak the leakage could not escape from the valve-casing. The nipple 2', being of less diameter than the shoulder k,permits of only partially unscrewing the cap in order to obtain a slight flow of oil, and should the oil be found not of the proper kind the mistake would be discovered before the cap is completely removed, while be broken or lost it would not be noticed until the cap was completely removed, often resulting in the loss of the oil, owing to the difficulty of replacing the cap against the pressure of the outflowing oil or other liquid.

E is a set-screw to prevent the valve from turning While the cap is being screwed o n,and should it be desired at any time to grind the valve-seat the screw E is simply turned out to the desired extent, when the valve may turned on its seat by means of the rodf.

Having thus fullydescribed myinvention, what I. claim is 1. In a discharge-valve for tank-cars, &c.,

the combination with the casing open from end to end and provided with a valve-seat at with the devices nowiu use should the valve one end, a winged valve in said casing adapted to said seat, a screw-threaded stem carried by said valve, a cap formed with a wrenchhold and an annular flange engaging said cas- IOO ing and an inhernally-screw-threaded nipple an annular flange around said nipple engagengaging said stem and formed with an annuing the lower end of said casing and an adlar shoulder at its base fitting in said casing. justable stop carried by the casing to prevent 2. In a discharge-valve for tank-cars, &e.-, the valve from turning. 5 the combination with the casing having a In testimony whereof I affix my signature 15 valve-seat; and an opening below the seat, of in presence of two witnesses.

a winged valve guided in said casing and CHARLES O. ROWLEY. adapted to said seat; and having a stem in Witnesses: axial line with said casing, a cap integrally D. D. GRANT,

|o formed with a nipple engaging said stem and J. T. BARTLEY. 

